3.9.2. OpenMP directives¶
Since no loop-level constructs are used, only a small number of OpenMP 4.5 directives are relevant and needed. The most important ones are listed here and detailed in subsections:
!$omp target
/!$omp end target
is analogous to!$omp parallel
, in that it defines a section of the code that will be executed on the GPU!$omp teams
is used to set the number of GPU threads that execute in parallel in a thread block!$omp declare target (v1, v2, ...)
is used to specify if an array should exist only on the GPU, or should exist on both the GPU and CPU!$omp target update
is used to update (synchronize) data on the GPU and CPU